Electronic ballast

Details Electronic ballast Electronic ballast

1998-05-14

1999-10-19

Shingleton, Michael B

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

With power factor control device

315224, 315DIG7, 315307, H05B 3700

Patent

active

059694840

ABSTRACT:
A discontinuous conduction mode (DCM) electronic ballast topology is presented which drives the lamp with line frequency voltage and current, just like a magnetic ballast. However, compared to magnetic ballast, its weight is substantially reduced due to operation at high switching frequency (40 kHz in the experimental prototype). The topology also ensures unity power factor at the input and stable lamp operation at the output.

REFERENCES:
patent: 3789266 (1974-01-01), Polman et al.
patent: 4277728 (1981-07-01), Stevens

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